Free sales tax calculator
GST, HST, PST and QST calculator for contractors.
Pick the province where the job is, enter a price, and get each tax as its own line, ready to copy onto a quote or invoice. Or start from a tax-included total and work back to the price.
Rates and rules checked November 13, 2026
Which province's tax goes on the quote?
For work on a building or land, the general rule for GST/HST is that the tax follows the property: a renovation in Gatineau is taxed at Québec's GST + QST even if your shop is in Ottawa, and a kitchen in Ottawa is taxed at Ontario's 13 % HST even if you live in Gatineau. When in doubt, use the province where the job site is and confirm with the CRA's place-of-supply rules.
Show each tax on its own line
A commercial customer needs your GST/HST number and the tax amount on the invoice to claim input tax credits, and in Québec the same goes for your QST number. One blended "tax 14.975 %" line makes their bookkeeper's job harder and can delay your payment. Show GST and QST (or GST and PST) separately, each with its rate.
In Québec, the QST is calculated on the price before GST, not on price plus GST. That has been the rule since 2013, which is why $10,000 of work comes to $500 GST + $997.50 QST = $11,497.50.
PST and RST on installed work: check first
In British Columbia, Saskatchewan and Manitoba, whether you charge PST/RST to the customer or pay it yourself on the materials depends on the kind of contract (for example, supply-and-install work on a home versus selling goods). The calculator shows the provincial tax the way it applies to a sale; check your trade's rules with the provincial tax office before you leave the PST line on a renovation quote.
This calculator does arithmetic on the numbers you enter. It is not tax or legal advice; check your situation with the CRA, your provincial tax office or your accountant.
Sales tax rates by province (2026)
| Province or territory | Taxes to charge | Combined rate |
|---|---|---|
| Alberta | GST 5 % | 5 % |
| British Columbia | GST 5 % + PST 7 % | 12 % |
| Manitoba | GST 5 % + RST 7 % | 12 % |
| New Brunswick | HST 15 % | 15 % |
| Newfoundland and Labrador | HST 15 % | 15 % |
| Northwest Territories | GST 5 % | 5 % |
| Nova Scotia | HST 14 % | 14 % |
| Nunavut | GST 5 % | 5 % |
| Ontario | HST 13 % | 13 % |
| Prince Edward Island | HST 15 % | 15 % |
| Quebec | GST 5 % + QST 9.975 % | 14.975 % |
| Saskatchewan | GST 5 % + PST 6 % | 11 % |
| Yukon | GST 5 % | 5 % |
Questions contractors ask
Do I charge GST/HST on labour as well as materials?
Yes. If you are registered, GST/HST applies to most construction and renovation services, labour included, not only to the materials.
When do I have to register for GST/HST?
Once your taxable sales pass $30,000 over four consecutive calendar quarters, you are no longer a small supplier and must register and charge tax. Below that, registering is optional. Québec's QST uses the same $30,000 threshold.
How do I take the tax out of a total?
Divide the total by 1 plus the combined rate. In Ontario: $1,130 ÷ 1.13 = $1,000 before HST. Choose "Remove tax from a total" above and the calculator splits the tax into its lines for you.
Is QST charged on top of GST?
No. Since January 1, 2013, QST is calculated on the selling price excluding GST, so the two taxes are simply added side by side.
Stop doing this math by hand.
quoteai writes the whole quote from a few words: line items, your markup, the right taxes for the customer's province, deposits and progress billing. Then the contract, the invoice and the payment use the same numbers.
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